Battery charger



FIG. 1 is a front perspective view of a battery charger;

FIG. 2 is a back bottom perspective view of the battery charger;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a back elevational view thereof;

FIG. 7 is a left elevational view thereof; and,

FIG. 8 is a right elevational view thereof.

The broken lines shown in the drawings of the battery charger are for illustrating portions of the article and form no part of the claimed design. 

CLAIM We claim the ornamental design for a battery charger, as shown and described. 